In this article, we take the point of view that the charmed scalar meson Ds0(2317) is the conventional cs̄ meson and devote to evaluate the strong coupling constant gDs0DK within the framework of the light-cone QCD sum rules approach. The numerical values for the large scalar-DK coupling constant gDs0DK support the hadronic dressing mechanism, just like the scalar mesons f0(980) and a0(980), the...

The prominent feature of the η meson is that it couples dominantly to the N(1535) (S11) resonance at threshold energies. The low-momentum η meson would then mainly excite N–nucleon-hole (N-h) states in nuclear matter. Therefore the η meson nuclear dynamics is sensitive to modifications of nucleon and N properties in medium. If some medium effects and/or a density increase bring the N-h state do...

The strange-quark vector current ρ-to-π meson transition form factor is computed at one-loop order using strange meson intermediate states. A comparison is made with a φ-meson dominance model estimate. We find that one-loop contributions are comparable in magnitude to those predicted by φ-meson dominance. It is possible that the one-loop contribution can make the matrix element as large as thos...

A knowledge of the radial distributions of quarks inside hadrons could lead to a better understanding of the QCD description of these hadrons and possibly suggest forms for phenomenological models. As a step in this direction, we have measured the charge (vector) and matter (scalar) densities of a heavy-light meson. More explicitly, the heavy-light meson is simplified to being an infinitely hea...

We derive the effective Lagrangian for the low-energy massive meson excitations of the color-flavor-locking (CFL) phase of QCD with 3 flavors of light quarks. We compute the decay constants, the maximum velocities, and the masses of the mesons at large baryon chemical potential µ. The decay constants are linear in µ. The meson maximum velocities are close to that of sound. The meson masses in t...

The confinement mechanism proposed earlier by the author is applied to estimate the possible parameters of the confining SU(3)-gluonic field in an η-meson. For this aim the electric form factor of an η-meson is nonperturbatively computed in an explicit analytic form. The estimates obtained are also consistent with the width of the electromagnetic decay η → 2γ. The corresponding estimates of the...

The intrinsic electromagnetic nuclear meson exchange charge and current operators arising from a separation of the center-of-mass motion are derived for a one-boson-exchange model for the nuclear interaction with scalar, pseu-doscalar and vector meson exchange including leading order relativistic terms. Explicit expressions for the meson exchange operators corresponding to the different meson t...

We calculate the mass spectrum of the scalar meson nonet in the Nambu–JonaLasinio model (NJL model) with the ’t Hooft interaction. We also include corrections connected with meson loops in our analysis. The masses of the pseudoscalar and scalar meson nonets are in a satisfactory agreement with experimental data except for the mass of the f0(980) scalar meson. In order to describe this mass more...

In the heavy quark limit inclusive production rate of a heavy meson can be factorized, in which the nonperturbative effect related to the heavy meson can be characterized by matrix elements defined in the heavy quark effective theory. Using this factorization, predictions for the full spin density matrix of a spin-1 and spin-2 meson can be obtained and they are characterized only by one coeffic...

In this work we give a theoretical description of the elastic vector meson production in diffractive DIS developed within the kt-factorization formalism. Since the kt-factorization scheme does not require large values of Q+mV , we conduct an analysis that is applicable to all values of Q from photoup to highly virtual production of vector mesons. The basic quantity in this approach — the uninte...